Note: Reading and/or writing of GIF images requires a license to use Unisys
patented Lempel Ziv Welch (LZW) data compression and decompression technology from
GNU software states the
“No license or license fees are required for non-commercial, not-for-profit GIF-based
applications or for non-commercial, not-for-profit GIF-freeware, so long as the LZW
capability provided is only for GIF. However, a license is required if freeware is
incorporated into, or sold or distributed with a commercial or for-profit product, introduced
in 1995 [or later], or enhancements of products that were introduced prior to 1995.”
More information can be found at Unisys.
This Component ‘Gif89a’ was created with VC 5.0
and ATL. You don’t need any DLL for using this control (even atl.dll and
mfc….dll). The source code is provided.
This control has 7 properties and 3 methods and can be used to play any animated
Properties of the Control:
Filename – name of your GIF file.
Autosize – control will change size
automatically when you load new GIF image by setting Filename property.
Autostart – control will show picture
automatically when you set Filename property.
Speed – delay in 1/100 sec. If GIF
itself doesn’t has delay control will use this number.
Embed – when true control will store
GIF file in exe module. You can use it only in dialog form when you create this
form with dialog editor.
Class – when false control will paint
empty space with background color of OleContainer. If true then control will not
do it. Use this property only in case when you have background bitmap.
Methods of the Control:
Stop – understandable.
Start – understandable.
About – you will see a little dialog
box with information about me.